CN203278629U - A novel filter - Google Patents
A novel filter Download PDFInfo
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- CN203278629U CN203278629U CN 201320303420 CN201320303420U CN203278629U CN 203278629 U CN203278629 U CN 203278629U CN 201320303420 CN201320303420 CN 201320303420 CN 201320303420 U CN201320303420 U CN 201320303420U CN 203278629 U CN203278629 U CN 203278629U
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Abstract
Provided is a novel filter arranged between a three-phase power supply and an electric device. The key of the novel filter is that a five-stage filtering circuit comprises a first differential mode filtering circuit, a first common mode filtering circuit, a low-frequency differential mode and common mode composite filtering circuit, a second common mode filtering circuit, and a second differential mode filtering circuit which are connected successively in series in the structure of the novel filter, that the three-phase power supply is connected with the first differential mode filtering circuit, that the second common mode filtering circuit is connected with the electric device, that interference signals of the three-phase power supply pass through the first differential mode filtering circuit and the first common mode filtering circuit in which a high-frequency differential mode interference signal and a high-frequency common mode interference signal are filtered and then are transmitted to the low-frequency differential mode and common mode composite filtering circuit to undergo filtering of a low-frequency differential mode interference signal and a low-frequency common mode interference signal, and that secondary auxiliary filtering is executed by means of the second common mode filtering circuit and the second differential mode filtering circuit. The five-stage filtering effectively guarantees a steady signal supplied for the electric device by the three-phase power supply. In addition, the interference signals of the electric device are filtered by the filter so that electromagnetic interference on three-phase power is effectively eliminated.
Description
Technical field
The utility model belongs to the wave filter technology field, specifically a kind of two-way filter between three phase mains and power consumption equipment of arranging with Pyatyi filter function.
Background technology
at present, traditional filter is generally to be made of the differential mode filter circuit, or formed by common mode filtering circuit, or consisted of by differential mode filter circuit and common mode filtering circuit simple combination, if it is directly applied between three phase mains and power consumption equipment, can produce a lot of drawbacks in actual application, filter effect is bad, power consumption equipment also can inevitably produce certain interference to three phase mains in the course of the work in addition, filter in the market mostly is single-ended filter (inputing or outputing mode filter), can't realize bidirectional filtering, have a strong impact on the normal operation of power consumption equipment.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model has designed a kind of Novel Filter, this filter is arranged between three phase mains and power consumption equipment, effectively remove three phase mains by Pyatyi filtering and input to interference signal between power consumption equipment, also can effectively remove simultaneously the interference signal that power consumption equipment produces three-phase electricity, wherein this power consumption equipment can be elevator electric energy feedback apparatus, so just can incorporate the electric energy feedback apparatus output end signal into three phase network through filter filtering, effectively remove the electromagnetic interference of elevator, guarantee the elevator normal operation.
the utility model is to realize that the technical scheme that goal of the invention adopts is: a kind of Novel Filter, this filter is arranged between three phase mains and power consumption equipment, key is: in described filter circuit configuration by successively the series connection the first differential mode filter circuit, the first common mode filtering circuit, low frequency differential mode and common mode compound filter circuit, the second common mode filtering circuit, and the Pyatyi filter circuit of the second differential mode filter circuit composition, three phase mains is connected with the first differential mode filter circuit, the second differential mode filter circuit is connected with power consumption equipment, the interference signal of three phase mains is through the first differential mode filter circuit, the first common mode filtering circuit disturbs high frequency differential mode, after the filtering of high frequency common mode interference signal, deliver to the low frequency differential mode and common mode compound filter circuit carries out the low frequency differential mode, the common mode interference signal filtering, afterwards by the second common mode filtering circuit, and the second differential mode filter circuit carries out the secondary auxiliary filter.
The beneficial effects of the utility model are: 1, the three-phase power input end signal is supplied with power consumption equipment after Pyatyi filtering, and signal is steady; 2, power consumption equipment through filter filtering, is eliminated the electromagnetic interference to three phase network, has realized the bidirectional filtering between three phase mains and power consumption equipment, and filter effect significantly improves; 3, adopt Pyatyi filtering, effectively filtering high frequency, low frequency differential mode interference and high frequency, low frequency common mode disturbances, guarantee the normal operation of power consumption equipment.
Description of drawings
Fig. 1 is circuit structure diagram of the present utility model;
In accompanying drawing, 1 is the first differential mode filter circuit, and 2 is first common mode filtering circuits, the 3rd, and low frequency differential mode and common mode compound filter circuit, 4 is second common mode filtering circuits, 5 is second differential mode filter circuits, the 6th, power consumption equipment.
Embodiment
a kind of Novel Filter, this filter is arranged between three phase mains and power consumption equipment 6, importantly: in described filter circuit configuration by successively the series connection the first differential mode filter circuit 1, the first common mode filtering circuit 2, low frequency differential mode and common mode compound filter circuit 3, the second common mode filtering circuit 4, and the Pyatyi filter circuit of the second differential mode filter circuit 5 compositions, three phase mains is connected with the first differential mode filter circuit 1, the second differential mode filter circuit 5 is connected with power consumption equipment, the interference signal of three phase mains is through the first differential mode filter circuit 1, the first common mode filtering circuit 2 disturbs high frequency differential mode, after the filtering of high frequency common mode interference signal, deliver to the low frequency differential mode and common mode compound filter circuit 3 carries out the low frequency differential mode, the common mode interference signal filtering, afterwards by the second common mode filtering circuit 4, and the second differential mode filter circuit 5 carries out the secondary auxiliary filter.Three phase mains is at supply of electrical energy during to power consumption equipment 6, electric energy is delivered to power consumption equipment 6 after Pyatyi filtering, the all interference in power supply process have effectively been eliminated, interference is down to minimum, equally, to the interference signal that power consumption equipment 6 in use produces, also the process filter filtering is to eliminate the interference of 6 pairs of three-phase electricity of power consumption equipment, this two-way filtering mode, filter effect is better.
for filtering low frequency differential mode and common mode disturbances, with reference to accompanying drawing 1, first group of filtering branch circuit of being connected with capacitor C 7 and being formed by choking-winding L3 is set in the structure of low frequency differential mode and common mode compound filter circuit 3, second group of filtering branch circuit of connecting with capacitor C 8 and forming by choking-winding L3, the 3rd group of filtering branch circuit of being connected with capacitor C 9 by choking-winding L3 and forming, two groups of first group of filtering branch circuit have been arranged in parallel between article one live wire in three-phase power line and ground, two groups of second group of filtering branch circuit have been arranged in parallel between second live wire and ground, article three, two groups of the 3rd group of filtering branch circuit have been arranged in parallel between live wire and ground.Also be included in low frequency differential mode and common mode compound filter circuit 3 structures resistance R 4, R5, R6 are set between live wire in twos.
For the filtering high frequency differential mode is disturbed, and realize bi-directional symmetrical filtering, be provided with the first identical differential mode filter circuit 1 of circuit principle structure and the second differential mode filter circuit 5.With reference to accompanying drawing 1, the first differential mode filter circuit 1 structure comprises second group of RC filter circuit that first group of RC filter circuit being formed in parallel by capacitor C 1 and resistance R 1, capacitor C 2 and resistance R 2 compose in parallel, by the 3rd group of RC filter circuit that capacitor C 3 and resistance R 3 compose in parallel, three groups of filter circuits are connected between three live wires and ground.Three groups of RC filter circuits in the second differential mode filter circuit 5 comprise second group of RC filter circuit that first group of RC filter circuit being formed in parallel by capacitor C 16 and resistance R 7, capacitor C 17 and resistance R 8 compose in parallel, the 3rd group of RC filter circuit that is composed in parallel by capacitor C 18 and resistance R 9.
For the filtering high frequency common mode is disturbed, and realize bi-directional symmetrical filtering, be provided with the first identical common mode filtering circuit 2 of circuit principle structure and the second common mode filtering circuit 4.With reference to accompanying drawing 1, second group of LC filter circuit that first group of LC filter circuit that three groups of LC filter circuits in described the first common mode filtering circuit 2 comprise the inductance L between live wire 1 in twos that is overlapped in three-phase power line, be formed in parallel by capacitor C 4 and inductance L 1, capacitor C 5 and inductance L 1 compose in parallel, the 3rd group of LC filter circuit that is composed in parallel by capacitor C 6 and inductance L 1.Second group of LC filter circuit that first group of LC filter circuit that three groups of LC filter circuits in described the second common mode filtering circuit 4 comprise the inductance L between live wire 2 in twos that is overlapped in triple line, be formed in parallel by capacitor C 13 and inductance L 2, capacitor C 14 and inductance L 2 compose in parallel, the 3rd group of LC filter circuit that is composed in parallel by capacitor C 15 and inductance L 2.
During concrete enforcement, with reference to accompanying drawing 1, input to the signal of power consumption equipment from three-phase power output end, after interference enters from the first differential mode filter circuit 1, the part high frequency differential mode is disturbed, after capacitive absorption, return to the earth by electric capacity, the part high frequency common mode is disturbed, by the first common mode filtering circuit 2 filterings, then disturb by low frequency differential mode and common mode compound filter circuit 3 filtering low frequency common and different modes, finally by the second common mode filtering circuit 4 and the second differential mode filter circuit 5 again filtering enter electricity consumption and arrange 6.
For power consumption equipment 6 ends, after the interference signal that produces enters from the second differential mode filter circuit 5, the part high frequency differential mode is disturbed, after capacitive absorption, set up interim benchmark ground by electric capacity, remove by the soft generating of resistance again and disturb, the part high frequency common mode is disturbed, by the second common mode filtering circuit 4 filterings, then disturb by low frequency differential mode and common mode compound filter circuit 3 filtering low frequency common and different modes, finally by the first common mode filtering circuit 2 and the first differential mode filter circuit 1 again filtering to exempt the interference to three phase mains.
In addition, when this filter specifically is used in elevator device, input to the signal of apparatus for controlling elevator from three-phase power output end, after interference enters from the first differential mode filter circuit 1, the part high frequency differential mode is disturbed, after capacitive absorption, return to the earth by electric capacity, the part high frequency common mode is disturbed, by the first common mode filtering circuit 2 filterings, then disturb by low frequency differential mode and common mode compound filter circuit 3 filtering low frequency common and different modes, finally by the second common mode filtering circuit 4 and the second differential mode filter circuit 5 again filtering enter elevator electric energy feedback apparatus.
For the elevator electric energy feedback apparatus output, after the electric energy feedback signal with interference signal enters from the second differential mode filter circuit 5, the part high frequency differential mode is disturbed, after capacitive absorption, set up interim benchmark ground by electric capacity, remove by the soft generating of resistance again and disturb, the part high frequency common mode is disturbed, by the second common mode filtering circuit 4 filterings, then disturb by low frequency differential mode and common mode compound filter circuit 3 filtering low frequency common and different modes, finally by the first common mode filtering circuit 2 and the first differential mode filter circuit 1 again filtering incorporate three-phase power input end into, i.e. electrical network.The three-phase power input end signal is supplied with elevator after Pyatyi filtering like this, and signal is steady; The electric energy feedback apparatus output end signal is incorporated three phase network through filter filtering into after the elimination electromagnetic interference, and efficent use of resources avoids waste; Adopt Pyatyi filtering, effectively filtering high frequency, low frequency differential mode interference and high frequency, low frequency common mode disturbances, guarantee the running of elevator.
Claims (8)
1. Novel Filter, this filter is arranged between three phase mains and power consumption equipment (6), it is characterized in that: in described filter circuit configuration by successively the series connection the first differential mode filter circuit (1), the first common mode filtering circuit (2), low frequency differential mode and common mode compound filter circuit (3), the second common mode filtering circuit (4), and the Pyatyi filter circuit of the second differential mode filter circuit (5) composition, three phase mains is connected with the first differential mode filter circuit (1), the second differential mode filter circuit (5) is connected with power consumption equipment, the interference signal of three phase mains is through the first differential mode filter circuit (1), the first common mode filtering circuit (2) disturbs high frequency differential mode, after the filtering of high frequency common mode interference signal, deliver to the low frequency differential mode and common mode compound filter circuit (3) carries out the low frequency differential mode, the common mode interference signal filtering, afterwards by the second common mode filtering circuit (4), and the second differential mode filter circuit (5) carries out the secondary auxiliary filter.
2. a kind of Novel Filter according to claim 1, it is characterized in that: the structure of described low frequency differential mode and common mode compound filter circuit (3) comprise electric capacity connect with choking-winding the filtering branch circuit that forms, by the filtering branch circuit filter branch that forms in parallel and be arranged at the resistive element between live wire in twos, filter branch is arranged between every live wire and ground wire.
3. a kind of Novel Filter according to claim 1, it is characterized in that: described the first differential mode filter circuit (1) is identical with the circuit structure of the second differential mode filter circuit (5), and circuit structure comprises three groups of RC filter circuits being series in three-phase power line between every live wire and ground wire, and the supporting capacity cell of connecting with every group of RC filter circuit.
4. a kind of Novel Filter according to claim 1, it is characterized in that: described the first common mode filtering circuit (2) is identical with the circuit structure of the second common mode filtering circuit (4), and circuit structure comprises three groups of LC filter circuits that are series in three-phase power line between every live wire and ground wire.
5. a kind of Novel Filter according to claim 3, it is characterized in that: three groups of RC filter circuits in described the first differential mode filter circuit (1) comprise second group of RC filter circuit that first group of RC filter circuit being formed in parallel by capacitor C 1 and resistance R 1, capacitor C 2 and resistance R 2 compose in parallel, the 3rd group of RC filter circuit that is composed in parallel by capacitor C 3 and resistance R 3.
6. a kind of Novel Filter according to claim 3, it is characterized in that: three groups of RC filter circuits in described the second differential mode filter circuit (5) comprise second group of RC filter circuit that first group of RC filter circuit being formed in parallel by capacitor C 16 and resistance R 7, capacitor C 17 and resistance R 8 compose in parallel, the 3rd group of RC filter circuit that is composed in parallel by capacitor C 18 and resistance R 9.
7. a kind of Novel Filter according to claim 4, it is characterized in that: second group of LC filter circuit that first group of LC filter circuit that three groups of LC filter circuits in described the first common mode filtering circuit (2) comprise the inductance L between live wire 1 in twos that is overlapped in three-phase power line, be formed in parallel by capacitor C 4 and inductance L 1, capacitor C 5 and inductance L 1 compose in parallel, the 3rd group of LC filter circuit that is composed in parallel by capacitor C 6 and inductance L 1.
8. a kind of Novel Filter according to claim 4, it is characterized in that: second group of LC filter circuit that first group of LC filter circuit that three groups of LC filter circuits in described the second common mode filtering circuit (4) comprise the inductance L between live wire 2 in twos that is overlapped in three-phase power line, be formed in parallel by capacitor C 13 and inductance L 2, capacitor C 14 and inductance L 2 compose in parallel, the 3rd group of LC filter circuit that is composed in parallel by capacitor C 15 and inductance L 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320303420 CN203278629U (en) | 2013-05-30 | 2013-05-30 | A novel filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320303420 CN203278629U (en) | 2013-05-30 | 2013-05-30 | A novel filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203278629U true CN203278629U (en) | 2013-11-06 |
Family
ID=49508954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320303420 Expired - Lifetime CN203278629U (en) | 2013-05-30 | 2013-05-30 | A novel filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203278629U (en) |
-
2013
- 2013-05-30 CN CN 201320303420 patent/CN203278629U/en not_active Expired - Lifetime
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131106 |